Gas burner



Feb. 21, 1928.

A. STE FFEN GAS BURNER Filed April 9, 1925 22 f 3a aa INVENTOR Adolf Steffen. 6

ATTORNEY Patented Feb. 21, 1928. l

UNITED STATES,

g 1,660,018 PATENT OFFICE.

DOLE s'rnrrEN,

i MANUFACTURING COMPANY, A

0F PITTSBURGH, PENNSYLVANIA, ASSIGNOR TO ADAMS BROTHERS CORPORATION OF PENNSYLVANIA.

GAS BURNER.

Appucanon med .apra 9, 1925. serial No. 21,817.

gas heating de- My invention relates to u for air burner nozzles thereon, and having depend-l ing and integral flange members thereinV or ensuring a substantially even distribution of gas to the nozzles. Each of the burner nozzles embodies a relatively small, removable tubular member having a plurality of relatively narrow, deep and short, radial slits therein.

'In the single sheet of drawings,

Figure 1 is aview, in side elevation, of a device embodying my invention,

Fig. 2 is an end view of a receiving chamber embodying, my invention, l n

Fig.V 3 is a view, l'nlateral section therethrough, taken on the line III-1110i Fig. 1,

Fig. 4 is a view, `'n lateral section therethrough, taken on the line IV-IV of Fig. 1,

Fig. 5 is a top planfview of a burner nozzle embodying my invention, and

Fig. 6 is a view, in side elevationthereof.

An intake pipe 11 has an opening at one end thereof, y for the admission of air, anda tubular inlet 13 having the usual needle Avalve 14 therein to regulate the amount of gas admitted. The intake pipe 11 is provided with a lateral extension 15 that extendsy substantially at right angles to the main bodyv of the intake pipe and is provided with a socket or seat 16 to receive one end of a receiving chamberf17. The receiving chamber. 17 is substantiall rectangular in lateral section but has a esser width at the top portion than at the bottom portion and is narrower at'the outer end than at that end fitting into the extension 15. It is relativelyl long and has a plurality of substantially circular openings 18 in the top wall thereof, which openings are symmetrically spaced from each designated by the numeral 12,`

other over substantially the entire length of the member 17. Any suitable or desired means may be employed to hold one end of the member 17 within the seat 16 in the extension 15.

I prefer to make the member 17 oicast iron, and also to make it initially with an open bot-tom but with a shoulder 19 and 21 at the bottom edge of each of the sidewalls andto close the chamber by a plate 22 that is suitably securedthereagainst as by brazing or welding. The member 11 is prefer-v ably provided with an integral supporting lug 23 that is adapted to abut against lthe member 22 and to thereby support the ref ceiving chamber 17. L

The gas burner is particularly adapted for use in gas vheaters of the open radiant type, comprising a lurality of vertically extending tubular c ay radiants that. are heated by the burning gas and become luminous. Such gas heaters usually embody an ornamental casing and the assembly illustrated in Fig. 1 of the Ydrawing is lo-4 cated in the bottom portion thereof with substantially all of the parts hidden from view. I prefer to employ an intake pipe of the kind illustrated and to mount the receiving chamber immediately thereabove whereby the gaseous mixture is caused to enter vthe relatively long receiving chamber 17 at one end thereof. v

Means for effecting a unito-rm distribution ot' the gaseous mixture entering the receiving chamber to all of the openings 18 and of the burner .nozzles located therein and to be hereinafter described in detail, comprisesan integral vertically Vdepending flange member or baille 24 that is located at the entering end of the receiving chamber. The flange-24 comprises a relatively long intermediate portion and two shorter side. portions as is illustrated more particularly in Fig. 2 of .the drawings. When the gaseous mixture enters the intake pipe and Hows therethrough it will tend to flow toward the upper portion of the part 15 and if permitted to iow freely into the receiving chamber 17, a disproportionately large amount thereof would flow out through the irst few burners adjacent to the entering end of the chamber. The intermediate portion of the flange 24: causes a diversion of the gaseous -mixture downwardly against the bottom member 22 and thereby prevents too much llt) Q l l 1,660,018

mixture to flow along the insideof the twowalls of the chamber, an effect that is assisted by making the outer end of the chamber 17 relatively narrower than the entering end as hereinbefore described and as` more particularly shown in Fig. 2 of the drawings.v Y

A vertically depending lug 25 integral with the top wall of the receiving chamber' is located between the first and second openings adjacent to the entering end vof the chamber, and prevents an unduly large proportion of the gaseous mixture flowing out through and being burnt in the second burner nozzle. However,v I have found that' a depending flange such as hereinbefore described having a relatively long central portion and two shorter side portions is effective by itself to ensure a substantially uniform distribution of the gaseous mixture to all of the burner nozzles located on such a receiving chamber.

A plurality of burner nozzles 26 is located in the respective openings 18 and severally comprise a tubular metal member having an outer annular flange 27 therearound inv order to support the same on and in interfittingrelation with the upper wall of the chamber 17. The'internal diameter of the lower portion of the nozzle 26 is relatively large so that the thickness of the wall 28'isv relatively small. The upper portion of the burner nozzle has a smaller internal diameter than the lower portion, as may be noted from Fig. 5 of the drawings, and the relatively'thiclrwall 29 is provided with a plurality of relatively narrow, radially-extendy ing slits 31 that are symmetrically spaced peripherally thereof. The slits 31 are relatively narrow, deep, and short, thelatter di` mension being the radial one. The depth of the slits `in the portion 29 is relatively large as may be noted from the vsectional view il lustrated in Fig. l4 of the drawings.

An auxiliary air tube 32 is provided for each of lthe burner nozzles 26 and has'the bottom portion thereof extending through suitable openings 33 in the member 22, while ythe' upper end thereof is located within the portion 29 of the burner nozzle kWithin which it fits relatively closely.

The burner nozzles 26 may each be provided with one or a plurality of symmetrically spaced integral lugs 34 on the outside surfaces thereof. The lugs 34 serve to support a metal plate (not shown) upon which the hereinbefore mentioned clay radiants are supported in the gas heater frame or casing, the weight of these parts serving to hold the burner nozzles tightly Vagainst the upper surface of the chamber 17.

The closed outer end of the chamber ,17

may be provided with an integral portion 35 that may be a part of the member 22 or thai may be a part of the member 17, in order to permit of supporting the receiving` chamber from a suitable Vmetal cross bar 36, a short machine screw 37 being employed to hold the two members together.

As was hereinbeforenoted, it is believed that the gaseous mixture is caused to iiow along the inside surface vof the side walls of the receiving chamber by reason of the shape of the depending flange 24 and this construction is particularly effective when considering the location of the auxiliary air tubes 32 which are in the central portion of the chamber 17. I have found it possible to light the gaseous mixture when the needle valve 14 has once been properly adjusted without any flare backWor any tendency toward an explosive action, irrespective ofthe amount of gaseous mixture that is admitted to the int-altev pipe and to the receiving chamber. I have also'found that the burner nozzles. operate noiselessly even when 'a relatively high gas pressure is present, and

I vattribute this operation to the-'relatively large number of radial slits that are rela` tively Short kin the radial direction, but are relatively deep as compared to the width thereof. VI believe also, Vt-hat the auxiliary' air tube provided for each of the'burner nozzles aids in securing this eect.

While I have illustrated a receiving chamber into which the gaseousmixture is admitted at one end, it is easily possible to adapt my invention to a receiving chamber into which the gaseous mixture 'enters at a point intermediate its ends, and the provision of the vdepending `flanges 24 inthe path of the incoming gaseous mixture will effect the: properdistribution thereof to all ofthe burner nozzles.

Various modifications may be made in the device embodying my invention withoutdeparting fromthe spirit andV scope thereof, and it isV intended that al1 such 'modications shall be: included in the 'appended claims which` are tobeA limited'only bythe prior art.V Y v a I claim as my inventions--A 1.' In a burner assembly for gas heaters, the combination with an intake pipe,'and aV 2. In a gasburner assembly, the combination with an intake pipe, and an elongated receiving chamber connected therewith and havinga plurality ofalined burner nozzles thereon, of a vertically depending ange deeper at its center than at its sides at the entrance of said receiving chamber for effecting substantially uniform distribution ofa gaseous mixture to said nozzles.

3. In a gas burner assembly, the combination with an intake pipe and an elongated receiving chamber connected therewith and having a plurality of alined burner nozzles thereon, of a laterally-extendingflange, integral with said receiving chamber and having a relatively long intermediate portion and two shorter side portions extending into the path of flow of a gaseous mixture at the entrance thereof into the receiving chamber, for eecting substantially uniform distribution of a gaseous mixture to said nozzles.

4. In a gas burner assembly, the combination with an elongated receiving chamber, of a plurality of burner nozzles located thereon, each comprising a plurality of relatively narrow, deep and short radial slits for permitting a gaseous mixture to flow therethrough and be burned thereon, an air passage at the center of each nozzle, said slits communicating directly With the top of said passage.

5. In a gas burner assembly, the combination with an elongated relatively narrow receiving chamber, of a plurality of tubular burnerV nozzles located thereon in alined spaced relation, each having a plurality of radially-extending, relativelyk deep slits therein for permitting a gaseous mixture to flow therethrough, an auxiliary air tube exmixture for eecting substantially uniform vdistribution of the gaseous mixture to said burner nozzles. f

6. In a gas burner assembly, comprising in combination, an elongated receiving chamber having a plurality of openings in its top wall, avtubular burner nozzle posiy tioned in each of said openings and communicating directly with said chamber, each nozzle comprising a plurality of relatively narrow, deep and short radial slits for permitting a gaseous mixture to flow therethrough, and an auxiliary air tube extending into the tubular opening inside of said slits.

7. In a gas burner assembly, the combination with a receivingchamber, of a burner nozzle having a tubular opening in its center located thereon, said nozzle having a plurality of relatively narrow, deep and short radial slits for permitting a gaseous mixture to flow therethrough and be burned thereon, and an air tube extending into the bottom of said. tubular opening, said slits having direct communication with the top of said opening.

In testimony whereof, I have hereunto subscribed my name this fourth day of April, 1925.

ADOLF STEFFEN. 

